Sulphur dioxide measuring equipment used for food

Abstract

The invention relates to a device used for mensurating sulfur dioxide in food. The device solves the problems that the sulfur dioxide in a product with the high content of organic acid and a sample containing organic sulfur component can not be mensurated, and organic substance interference exists during the mensuration. The device comprises a liquid storage funnel. A liquid outlet at the bottom of the liquid storage funnel is communicated with a three-way pipe, one lateral pipe opening of which is a nitrogen input port, and a lower end of a conductor which is communicated with the other pipe opening is arranged in a distillation flask. The top of the distillation flask is communicated with a condenser tube inlet of a condenser, and a condenser tube outlet is communicated with a vent pipe. A cooling water cover covers over the outside of the condenser tube, and the cooling water cover is provided with a water outlet at the upper part and is provided with a water inlet at the lower part. The vent pipe is connected with four branch pipes in series by four three-way pipes, and each branch pipe extends into an absorption bottle respectively. The device can be used for mensurating the product with the high content of the organic acid and the sample containing the organic sulfur, and the device can eliminate the interference caused by the organic substance when mensurating the sulfur dioxide in food. The device is safe and convenient for operating, and reagents in use are all nontoxic and harmless and meet the requirement of environmental protection.

Description

technical field [0001] The invention relates to a detection device for detecting sulfur dioxide in food. Background technique [0002] The main methods currently used in the determination of sulfur dioxide in food are pararosaniline hydrochloride method, distilled iodometric method, formaldehyde iodometric method and distilled alkali titration method. The disadvantages of these methods are as follows: [0003] 1. Pararosaniline hydrochloride method. [0004] The main principle is to combine pararosaniline hydrochloride and sulfur dioxide to develop color and then measure it with a spectrophotometer. This method has the following disadvantages: [0005] 1) The color development system is unstable and has poor reproducibility, which often leads to large errors in the test results. [0006] 2) The detection time is long and time-consuming, and the entire test operation takes more than 5.5 hours, which is not suitable for rapid on-site detection. [0007] 3) There are also ...

AI Technical Summary

Problems solved by technology

[0025] In order to solve the problem of measuring sulfur dioxide in products with high organic acid content and samples containing organic sulfur components, as well as the problem of interference caused by organic substances during the measurement, the invention provides a new type of sulfur dioxide measuring device for food

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